About Page Extraction

Extract the following information from this charity's about/mission page. Return ONLY valid JSON matching the exact schema below.

CRITICAL EXTRACTION RULES:
- Only extract information that is EXPLICITLY stated on the page
- Do NOT infer, assume, or guess values
- If a field is not clearly present, return null
- For external evaluations (GiveWell, Charity Navigator, BBB): only include if the page EXPLICITLY mentions being rated or evaluated by that organization
- For zakat eligibility: only set to true if the page explicitly uses the word "zakat"
- For scholarly endorsements: only include names explicitly mentioned as endorsing the charity

Required fields:
- mission: String (50-2000 characters) - The charity's mission statement

Optional fields:
- vision: String or null (max 2000 characters) - Vision statement
- values: Array of strings (0-10 items) - Core values
- target_populations: Array of strings (0-10 items) - Populations served
- geographic_coverage: Array of strings (0-20 items) - Geographic coverage

Return JSON only. Do not include explanations or markdown formatting.